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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vetpress</journal-id><journal-title-group><journal-title xml:lang="ru">Аграрная наука</journal-title><trans-title-group xml:lang="en"><trans-title>Agrarian science</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-8155</issn><issn pub-type="epub">2686-701X</issn><publisher><publisher-name>Редакция журнала "Аграрная наука"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32634/0869-8155-2024-385-8-118-123</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-3225</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЗООТЕХНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ZOOTECHNICS</subject></subj-group></article-categories><title-group><article-title>Активность каталазы в молоке и ее корреляции с молочной продуктивностью коров в зависимости от срока лактации</article-title><trans-title-group xml:lang="en"><trans-title>Catalase activity in milk and its correlation with milk productivity of cows depending on the duration of lactation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0257-1643</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Savina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анастасия Анатольевна Савина, научный сотрудник отдела физиологии и биохимии сельскохозяйственных животных</p><p>пос. Дубровицы, 60, г. о. Подольск, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Anastasia Anatolyevna Savina, Researcher of the Department of Physiology and Biochemistry of Farm Animals</p><p>60 Dubrovitsy, Podolsk, Moscow Region, 142132</p></bio><email xlink:type="simple">kirablackfire@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6774-4288</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Воронина</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Voronina</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Оксана Александровна Воронина, старший научный сотрудник отдела физиологии и биохимии сельскохозяйственных животных, кандидат биологических наук</p><p>пос. Дубровицы, 60, г. о. Подольск, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Oksana Alexandrovna Voronina , Senior Researcher of the Department of Physiology and Biochemistry of Farm Animals, Candidate of Biological Sciences</p><p>60 Dubrovitsy, Podolsk, Moscow Region, 142132</p></bio><email xlink:type="simple">voroninaok-senia@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1533-8680</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зайцев</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaitsev</surname><given-names>S. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Юрьевич Зайцев, ведущий научный сотрудник отдела физиологии и биохимии сельскохозяйственных животных доктор биологических наук, доктор химических наук, профессор</p><p>пос. Дубровицы, 60, г. о. Подольск, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Sergey Yurievich Zaitsev, Leading Researcher of the Department of Physiology and Biochemistry of Farm Animals, Doctor of Biological Sciences, Doctor of Chemical Sciences, Professor</p><p>60 Dubrovitsy, Podolsk, Moscow Region, 142132</p></bio><email xlink:type="simple">s.y.zaitsev@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный исследовательский центр животноводства —ВИЖ им. академика Л.К. Эрнста</institution><country>Россия</country></aff><aff xml:lang="en"><institution>L.K. Ernst Federal Research Center for Animal Husbandry</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>23</day><month>08</month><year>2024</year></pub-date><volume>1</volume><issue>8</issue><fpage>118</fpage><lpage>123</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Савина А.А., Воронина О.А., Зайцев С.Ю., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Савина А.А., Воронина О.А., Зайцев С.Ю.</copyright-holder><copyright-holder xml:lang="en">Savina A.A., Voronina O.A., Zaitsev S.Y.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vetpress.ru/jour/article/view/3225">https://www.vetpress.ru/jour/article/view/3225</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. Цели данной работы — изучение активности каталазы в молоке здоровых коров с различным уровнем продуктивности и нахождение корреляции между изучаемыми показателями в разные периоды лактации, что является важным и актуальным в плане оценки антиоксидантной активности молока коров.</p></sec><sec><title>Методы</title><p>Методы. Анализ биохимических показателей коровьего молока провели с помощью системы CombiFoss 7 (Дания). Анализ суммарного количества водорастворимых антиоксидантов (СКВА) выполнен на приборе «Цвет-Яуза 01-АА». Статистическую обработку полученных результатов проводили в программах Microsoft Exсel при помощи пакета «Анализ данных», в программе R (пакет Psych). Пробы молока получали от коров черно-пестрой породы в течение целого года.</p></sec><sec><title>Результаты</title><p>Результаты. Вся выборка животных (N = 280) разбита на 6 групп по дням лактации: 11–30, 31–60, 61–90, 91–120, 121–180 и 180–300 дней (группы 1–6-я). В первые 11–30 дней лактации (группа 1-я) значение СКВА значительно выше (17,2 мг/мл), чем в последующие месяцы. Причем значения СКВА достаточно сильно колеблются. Существенные изменения наблюдались для активности каталазы: от 1,41 и 1,32 отн. ед. (группы 1-я и 6-я) до 0,44 отн. ед. (группа 3-я). В период раздоя и спада лактации (1-я и 6-я группы) наблюдаются наивысшие коэффициенты корреляции между каталазой и жиром — 0,51 и 0,57 соответственно. Для всех сроков лактации отмечается отрицательная корреляция каталазы с истинным белком. Таким образом, изучена активность каталазы в молоке здоровых коров в разные сроки лактации и найдены корреляции между изучаемыми показателями.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. The purpose of this work is to study the activity of catalase in the milk of healthy cows with different levels of productivity and to find a correlation between the studied indicators, which is important and relevant in terms of assessing the antioxidant activity of cows’ milk.</p></sec><sec><title>Methods</title><p>Methods. The analysis of biochemical parameters of cow’s milk was carried out using the “CombiFoss 7” system (Denmark). The analysis of the total amount of water-soluble antioxidants (TAWSA) was performed on the device “Tsvet-Yauza 01-AA”. Statistical processing of the obtained results was carried out in the Microsoft Excel programs using the “Data Analysis” package, the “R” program (“Psych” package). Milk samples were obtained from black-and-white cows during a whole year.</p></sec><sec><title>Results</title><p>Results. The entire sample of animals (N = 280) is divided into 6 groups by lactation days: 11–30, 31–60, 61–90, 91–120, 121–180 and 180–300 days (groups 1–6). In the first 11–30 days of lactation (group 1), the value of SKVA is significantly higher (17.2 mg/ml) than in the following months. Moreover, the values of the SKVA fluctuate quite strongly. Significant changes were observed for catalase activity: from 1.41 and 1.32 rel. units (groups 1 and 6) to 0.44 rel. units (group 3). During the period of bloating and lactation decline (groups 1 and 6), the highest correlation coefficients between catalase and fat are observed — 0.51 and 0.57, respectively. For all periods of lactation, there is a negative correlation of catalase with true protein. Thus, the activity of catalase in the milk of healthy cows at different periods of lactation was studied and correlations between the studied indicators were found.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>молоко коров</kwd><kwd>биохимия</kwd><kwd>антиоксиданты</kwd><kwd>каталаза</kwd><kwd>удой</kwd><kwd>срок лактациий</kwd></kwd-group><kwd-group xml:lang="en"><kwd>сow's milk</kwd><kwd>biochemistry</kwd><kwd>antioxidants</kwd><kwd>catalase</kwd><kwd>milk yield</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания № 124020200032-4 (FGGN-2024-0016).</funding-statement><funding-statement xml:lang="en">The research was carried out within the framework of state assignment No. 124020200032-4 (FGGN-2024-0016).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Farman A.A., Hadwan M.H. Simple kinetic method for assessing catalase activity in biological samples. Methods X. 2021; 8: 101434. https://doi.org/10.1016/j.mex.2021.101434</mixed-citation><mixed-citation xml:lang="en">Farman A.A., Hadwan M.H. Simple kinetic method for assessing catalase activity in biological samples. Methods X. 2021; 8: 101434. https://doi.org/10.1016/j.mex.2021.101434</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Silanikove N., Merin U., Leitner G. Nitrite and catalase levels rule oxidative stability and safety properties of milk: a review. RSC Advances. 2014; 4(50): 26476‒26486. https://doi.org/10.1039/C4RA03851G</mixed-citation><mixed-citation xml:lang="en">Silanikove N., Merin U., Leitner G. Nitrite and catalase levels rule oxidative stability and safety properties of milk: a review. RSC Advances. 2014; 4(50): 26476‒26486. https://doi.org/10.1039/C4RA03851G</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Lindmark-Månsson H., Åkesson B. Antioxidative factors in milk. British journal of Nutrition. 2000; 84(S1): 103‒110. https://doi.org/10.1017/S0007114500002324</mixed-citation><mixed-citation xml:lang="en">Lindmark-Månsson H., Åkesson B. Antioxidative factors in milk. British journal of Nutrition. 2000; 84(S1): 103‒110. https://doi.org/10.1017/S0007114500002324</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Ventsova I., Safonov V. Biochemical Screening of Lipid Peroxidation and Antioxidant Protection in Imported Cows During Adaptation. Advances in Animal and Veterinary Sciences. 2021; 9(8): 1203‒1210. http://doi.org/10.17582/journal.aavs/2021/9.8.1203.1210</mixed-citation><mixed-citation xml:lang="en">Ventsova I., Safonov V. Biochemical Screening of Lipid Peroxidation and Antioxidant Protection in Imported Cows During Adaptation. Advances in Animal and Veterinary Sciences. 2021; 9(8): 1203‒1210. http://doi.org/10.17582/ journal.aavs/2021/9.8.1203.1210</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Добриян Е.И. Антиоксидантная система молока. Вестник Воронежского государственного университета инженерных технологий. 2020; 82(2): 101‒106. https://doi.org/10.20914/2310-1202-2020-2-101-106</mixed-citation><mixed-citation xml:lang="en">Dobriyan E.I. Dairy antioxidant system. Proceedings of the Voronezh State University of Engineering Technologies. 2020; 82(2): 101‒106 (in Russian). https://doi.org/10.20914/2310-1202-2020-2-101-106</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Zámocký M., Gasselhuber B., Furtmüller P.G., Obinger C. Molecular evolution of hydrogen peroxide degrading enzymes. Archives of Biochemistry and Biophysics. 2012; 525(2): 131‒144. https://doi.org/10.1016/j.abb.2012.01.017</mixed-citation><mixed-citation xml:lang="en">Zámocký M., Gasselhuber B., Furtmüller P.G., Obinger C. Molecular evolution of hydrogen peroxide degrading enzymes. Archives of Biochemistry and Biophysics. 2012; 525(2): 131‒144. https://doi.org/10.1016/j.abb.2012.01.017</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Foroughi L.M., Kang Y.-N., Matzger A.J. Sixty years from discovery to solution: crystal structure of bovine liver catalase form III. Acta Crystallographica Section D: Biological Crystallography. 2011; 67(9): 756‒762. https://doi.org/10.1107/S0907444911024486</mixed-citation><mixed-citation xml:lang="en">Foroughi L.M., Kang Y.-N., Matzger A.J. Sixty years from discovery to solution: crystal structure of bovine liver catalase form III. Acta Crystallographica Section D: Biological Crystallography. 2011; 67(9): 756‒762. https://doi.org/10.1107/S0907444911024486</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Ko T.-P. et al. Structure of human erythrocyte catalase. Acta Crystallographica Section D: Biological Crystallography. 2000; 56(2): 241‒245. https://doi.org/10.1107/S0907444999015930</mixed-citation><mixed-citation xml:lang="en">Ko T.-P. et al. Structure of human erythrocyte catalase. Acta Crystallographica Section D: Biological Crystallography. 2000; 56(2): 241‒245. https://doi.org/10.1107/S0907444999015930</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Wu Y., Jiang S., Fu Z. Employment of teicoplanin-coated magnetic particles for quantifying gram-positive bacteria via catalase-catalyzed hydrolysis reaction of H2O2. Talanta. 2020; 211: 120728. https://doi.org/10.1016/j.talanta.2020.120728</mixed-citation><mixed-citation xml:lang="en">Wu Y., Jiang S., Fu Z. Employment of teicoplanin-coated magnetic particles for quantifying gram-positive bacteria via catalase-catalyzed hydrolysis reaction of H2O2. Talanta. 2020; 211: 120728. https://doi.org/10.1016/j.talanta.2020.120728</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Павленко О.Б., Василенко В.Н. Симбионтная микрофлора вымени здоровых коров и телок, ее роль в этиологии мастита. Ветеринарная патология. 2011; 4: 132‒136. https://elibrary.ru/owgjxp</mixed-citation><mixed-citation xml:lang="en">Pavlenko O.B., Vasilenko V.N. Symbiotic microflora of the udder of healthy cows and heifers, its role in the etiology of mastitis. Russian Journal of Veterinary Pathology. 2011; 4: 132‒136 (in Russian). https://elibrary.ru/owgjxp</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Naqqash T., Wazir N., Aslam K., Shabir G., Tahir M., Shaikh R.S. First report on the probiotic potential of Mammaliicoccus sciuri isolated from raw goat milk. Bioscience of Microbiota, Food and Health. 2022; 41(4): 149‒159. https://doi.org/10.12938/bmfh.2021-022</mixed-citation><mixed-citation xml:lang="en">Naqqash T., Wazir N., Aslam K., Shabir G., Tahir M., Shaikh R.S. First report on the probiotic potential of Mammaliicoccus sciuri isolated from raw goat milk. Bioscience of Microbiota, Food and Health. 2022; 41(4): 149‒159. https://doi.org/10.12938/bmfh.2021-022</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Alharbi N.K., Alsaloom A.N. Characterization of Lactic Bacteria Isolated from Raw Milk and Their Antibacterial Activity against Bacteria as the Cause of Clinical Bovine Mastitis. Journal of Food Quality. 2021; 1: 6466645. https://doi.org/10.1155/2021/6466645</mixed-citation><mixed-citation xml:lang="en">Alharbi N.K., Alsaloom A.N. Characterization of Lactic Bacteria Isolated from Raw Milk and Their Antibacterial Activity against Bacteria as the Cause of Clinical Bovine Mastitis. Journal of Food Quality. 2021; 1: 6466645. https://doi.org/10.1155/2021/6466645</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Taye Y., Degu T., Fesseha H., Mathewos M. Isolation and Identification of Lactic Acid Bacteria from Cow Milk and Milk Products. The Scientific World Journal. 2021; 1: 4697445. https://doi.org/10.1155/2021/4697445</mixed-citation><mixed-citation xml:lang="en">Taye Y., Degu T., Fesseha H., Mathewos M. Isolation and Identification of Lactic Acid Bacteria from Cow Milk and Milk Products. The Scientific World Journal. 2021; 1: 4697445. https://doi.org/10.1155/2021/4697445</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Lorenzen P.C., Martin D., Clawin-Rädecker I., Barth K., Knappstein K. Activities of alkaline phosphatase, γ-glutamyltransferase and lactoperoxidase in cow, sheep and goat’s milk in relation to heat treatment. Small Ruminant Research. 2010; 89(1): 18‒23. https://doi.org/10.1016/j.smallrumres.2009.11.013</mixed-citation><mixed-citation xml:lang="en">Lorenzen P.C., Martin D., Clawin-Rädecker I., Barth K., Knappstein K. Activities of alkaline phosphatase, γ-glutamyltransferase and lactoperoxidase in cow, sheep and goat’s milk in relation to heat treatment. Small Ruminant Research. 2010; 89(1): 18‒23. https://doi.org/10.1016/j.smallrumres.2009.11.013</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Федосова А.Н., Каледина М.В., Волощенко Л.В. Психротрофные бактерии сырого молока в технологии полутвердых сыров. Хранение и переработка сельхозсырья. 2020; 3: 171‒180. https://doi.org/10.36107/spfp.2020.306</mixed-citation><mixed-citation xml:lang="en">Fedosova A.N., Kaledina M.V., Voloshchenko L.V. Psychrotrophic Bacteria of Raw Milkin the Technology of Semi-Hard Cheese. Storage and Processing of Farm Products. 2020; 3: 171‒180 (in Russian). https://doi.org/10.36107/spfp.2020.306</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Савина А.А., Воронина О.А., Зайцев С.Ю. Сезонные закономерности изменения антиоксидантных и микроэлементных параметров молока коров черно-пестрой породы. Аграрная наука Евро-Северо-Востока. 2023; 24(5): 858‒867. https://doi.org/10.30766/2072-9081.2023.24.5.858-867</mixed-citation><mixed-citation xml:lang="en">Savina A.A., Voronina О.A., Zaitsev S.Yu. Seasonal patterns of changes in antioxidant and microelement parameters of milk from black-and-white cows. Agricultural Science Euro-North-East. 2023; 24(5): 858‒867 (in Russian). https://doi.org/10.30766/2072-9081.2023.24.5.858-867</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Кляпнев А.В., Великанов В.И., Янковская М.О., Погодина А.В., Клюев Н.В. Сравнительная ветеринарно-санитарная экспертиза молока разных производителей. Ветеринарный врач. 2021; 5: 16‒24. https://elibrary.ru/eqjrku</mixed-citation><mixed-citation xml:lang="en">Klyapnev A.V., Velikanov V.I., Yankovskaya M.O., Pogodina A.V., Klyuev N.V. Comparative veterinary-sanitary examination of milk from different producers. The Veterinarny Vrach. 2021; 5: 16‒24 (in Russian). https://elibrary.ru/eqjrku</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Цацулина А.П., Бочарова К.В., Ермакова Н.В. Изучение активности каталазы в молоке коров. Сетевой научный журнал ОрелГАУ. 2014; 2: 28‒29. https://elibrary.ru/tkquln</mixed-citation><mixed-citation xml:lang="en">Tsatsulina A.P., Bocharova K.V., Ermakova N.V. Study of catalase activity in cow’s milk. Setevoy nauchnyy zhurnal OrelGAU. 2014; 2: 28‒29 (in Russian). https://elibrary.ru/tkquln</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Stobiecka M., Król J., Brodziak A. Antioxidant Activity of Milk and Dairy Products. Animals. 2022; 12(3): 245. https://doi.org/10.3390/ani12030245</mixed-citation><mixed-citation xml:lang="en">Stobiecka M., Król J., Brodziak A. Antioxidant Activity of Milk and Dairy Products. Animals. 2022; 12(3): 245. https://doi.org/10.3390/ani12030245</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Щербакова Ю.В., Зиганшин Д.Д., Пашина А.С., Ахмадуллина Ф.Ю. Влияние режима пастеризации на каталазную активность молока. Вестник Казанского технологического университета. 2014; 17(16): 173‒174. https://elibrary.ru/stiewx</mixed-citation><mixed-citation xml:lang="en">Shсherbakova Yu.V., Ziganshin D.D., Pashina A.S., Ahmadullina F.Yu. The effect of the pasteurization regime on the catalase activity of milk. Herald of Kazan Technological University. 2014; 17(16): 173‒174 (in Russian). https://elibrary.ru/stiewx</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Азимов Г.И. Как образуется молоко. М.: Колос. 1965; 159.</mixed-citation><mixed-citation xml:lang="en">Azimov G.I. How milk is formed. Moscow: Kolos. 1965; 159 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Цюпко В.В. Состав молока и закономерности синтеза жира, белка и лактозы в молоке коров. Вiсник Днiпропетровського унiверситету. Бiологiя. Медицина. 2012; 3(2): 96‒101. https://elibrary.ru/pxintv</mixed-citation><mixed-citation xml:lang="en">Tsyupko V.V. Cows’ milk composition and regularities of fat, protein and lactose synthesis. Visnyk of Dnipropetrovsk University. Biology. Medicine. 2012; 3(2): 96‒101 (in Russian). https://elibrary.ru/pxintv</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Спринчан Е.Г., Болога М.К., Степурина Т.Г., Болога А.М., Поликарпов А.А. Особенности электрической активации молочной сыворотки. Электронная обработка материалов. 2011; 47(1): 77‒80. https://elibrary.ru/qzmwsv</mixed-citation><mixed-citation xml:lang="en">Sprinchan E.G., Bologa M.K., Stepurina T.G., Bologa A.M., Polikarpov A.A. Peculiarities of the electric activation of whey. Surface Engineering and Applied Electrochemistry. 2011; 47(1): 66‒69. https://doi.org/10.3103/S1068375511010182</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
